CN201421778Y

CN201421778Y - Metallized film large-capacity capacitor

Info

Publication number: CN201421778Y
Application number: CN2009200466260U
Authority: CN
Inventors: 陈重生
Original assignee: Yangzhou Rijing Electronic Co Ltd
Current assignee: Yangzhou Rijing Electronic Co Ltd
Priority date: 2009-06-18
Filing date: 2009-06-18
Publication date: 2010-03-10
Anticipated expiration: 2019-06-18

Abstract

The utility model relates to a metallized film large-capacity capacitor, which belongs to technology field of metallized film capacitor. For overcoming the problem of smaller capacity of the existingmetallized film capacitor, a plurality of metallized film capacitor cores are connected in parallel to form capacitor sets or the plurality of capacitor sets are tandem connected in a box and are sealed and solidified by epoxide resin, therefore, the metallized film large-capacity capacitor can provide 20muF-3000muF metallized film capacitors; when the temperature wide is -40degrees - +70degrees,the service life is longer than 10 years, polar dielectric requirements are not provided; the electrolytic capacitor is replaced by the metallized film large-capacity capacitor, the leakage problem after long-term use for the electrolytic capacitor does not occur; the application occasions of the metallized film large-capacity capacitor can be extended to railway lighting, bridge lighting, airportlighting and hybrid of modern development, and electric power automotive industry, and expands the scope of application for the metallized capacitor; the self cost is low, therefore the metallized film large-capacity capacitor not only meets the needs of the market, and also meets the trend of social environmental-protection in the future.

Description

The metallized film large value capacitor

Technical field

The utility model relates to a kind of metallized film large value capacitor, belongs to the metallic film capacitor technical field.

Background technology

Use capacitor generally to use electrochemical capacitor now in frequency converter and power rectifier portion, temperature when the rectification of loop rises or the intensification of external environment condition all causes the electrochemical capacitor minimizing in useful life, because the rising of capacitor self temperature equally also causes the reduction in useful life.Particularly the environmental requirement used of automobile is at-40 ℃ ~+85 ℃, and electrochemical capacitor is when temperature is lower, and capacity will lower about-25%; Environment in the frequency converter use, because voltage range changes greatly, for the environment for use of correspondence under high voltage, it is corresponding that electrochemical capacitor can only adopt series-parallel mode of several electric capacity, but the useful life of electrochemical capacitor is but because the characteristics of himself, in all kinds of electric capacity, have alminium electrolytic condenser only and have life problems, ordinary liquid alminium electrolytic condenser useful life theory is 5-10. under the prerequisite of guaranteeing the electrochemical capacitor quality, high temperature, superpressure are the key factors that causes liquid electrochemical capacitor to lose efficacy.The every rising of working temperature of liquid electrochemical capacitor will be shortened over half 10 ℃ of its useful lifes.

At above scene, can provide and use the long-life that substitutes, the high voltage withstanding metallized film large value capacitor of the miniaturization and of high reliability safety, adopt the corresponding words of metallic film capacitor, this type of electric capacity has good advantages such as proof voltage, and the metallic film capacitor under the environment that frequency converter uses is high voltage withstanding, and high rectified current, big capacity miniaturization.

Use the occasion of variable frequency power supply at present convertible frequency air-conditioner etc., temperature requirement generally can use in the lower occasion of-25 ℃ ~+70 ℃ scope rated voltage, at in the strictness relatively of the environment for use of variable frequency power supply, the requirement to the reliability of variable frequency power supply can realize basically.And at the world in recent years for the development of following clean energy resource, country constantly strengthens at the input of energy-saving and emission-reduction, use occasion at capacitor need to require higher, such as hybrid vehicle, and Electric power car is the variable frequency power supply that representative uses, the environment of its use is at-40 ℃ ~+85 ℃, capacitor at this type of requires to have good proof voltage, the capacity of the Capacity Ratio electrochemical capacitor of film capacitor is more guaranteed, dielectric film develops to more and more thinner direction, the volume miniaturization lightweight of capacitor, the assurance of proof voltage and fail safe is strengthened greatly.

At above environment for use and each requirement, this invention can be used at the environment than broad, high withstand voltage, and the metallized capacitor of the miniaturization and of high reliability, can provide variable frequency power supply, the use of Electric power car and aviation, bridge, the illumination in tunnel.

Summary of the invention

The purpose of this utility model is the present situation that solves existing metallized film capacitor low capacity, low-voltage, little electric current, cause the narrow deficiency of its range of application, simple in structure, economical and practical, super-large current, high voltage bearing a kind of metallized film large value capacitor are provided, on the basis that keeps the relevant superior function of existing metallic film capacitor, substitute part ordinary liquid alminium electrolytic condenser, thereby effectively widen range of application.

The purpose of this utility model is achieved through the following technical solutions, a kind of metallized film large value capacitor, the lead-in wire that comprises two ends, it is characterized in that, described capacitor also comprises forms capacitance group or some capacitance group again through coupled in series by several metallized film capacitor fuse connection in series-parallel in the box, box, and box is interior to be solidified with epoxy encapsulation; The lead-in wire at two ends connects the two ends of capacitance group respectively.

The metallized film capacitor fuse is a basement membrane with polyester film or polypropylene film, and the thickness of basement membrane is at 1～4 μ m, and reeling after the evaporated metal layer on the basement membrane constitutes.

The metal level of evaporation is aluminum metal layer or zinc-aluminium metal level on the basement membrane.

The resistance of the metal level side of evaporation is 2 Ω～12 Ω on the basement membrane.

The two electrode tip end faces spraying pltine and the Zinc-tin alloy metal level of metallized film capacitor fuse.

The section of two electrode tips of metallized film capacitor fuse is the flat shape.

The utility model is less in order to overcome existing metallic film capacitor capacity, by several metallized film capacitor fuses are composed in parallel capacitance group or some capacitance group are solidified with epoxy encapsulation again in coupled in series places box, thereby can provide 20 μ F ~ 3000 μ F metallic film capacitors, useful life was above 10 years when temperature range was used to-40 ℃ ~+70 ℃, nonpolarity dielectric requirement, in the capacity assurance and in proof voltage and miniaturization, played qualitative leap, with the utility model to replace electrochemical capacitor, no longer exist electrochemical capacitor in the later leakage problem of long-term use, the occasion of using can expand railway illumination to, and big bridge lighting, in the illumination of air harbor and the hybrid power of modern development, the Electric power car industry gets on, for metallized capacitor has been expanded the scope of application, because himself is cheap, satisfy the needs in market, also satisfied the trend of following social enviroment protection simultaneously.

Description of drawings

Fig. 1, the utility model structural representation;

Among the figure, 1 fuse, 2 fuses, 3 fuses, 4 lead-out wires, 5 lead-out wires, 6 epoxy resin, 7 boxes.

Embodiment

Further specify the utility model in conjunction with the accompanying drawings and embodiments, as shown in Figure 1, the utility model is by box 7, the capacitance group in the box 7, and the lead-out

wire

4,5 and the epoxy resin between box 7 and the capacitance group 6 that connect capacitance group constitute.Capacitance group is made up of the metallized film capacitor fuse 1,2 to N of some parallel connections according to the capacitance requirement, according to capacitance and voltage request, and can be with some capacitance group again through coupled in series.

The basement membrane that capacitor core 1 or N adopt is polyester film or polypropylene film, the thickness of basement membrane is at 1 ~ 4 μ m, reel later on through evaporated metal layer, the film of evaporation is aluminum metallization layers (ALMETALLIZED FILM is commonly called as safety diaphragm) or zinc-aluminium metal level, the characteristics of this kind material: plate the layer of metal layer on the surface of film, metal level has good electrical conductivity and self-healing property, be difficult for oxidation and be easy to depositing, the uniformity of coating is better, the adhesive force jail, have excellent mechanicalness and electrical property, side's resistance of general coating is 2 Ω--12 Ω.

The capacitor core 1 of winding or N heat-treat and hot-forming after again its electrode tip is carried out metal spraying, make the both ends of the surface of fuse spray the metal level that does not contain lead, be pltine and Zinc-tin alloy metal level, metal layer thickness is 0.45 ± 0.1mm, can guarantee the strong bonded of fuse and metal level like this, fuse is carried out judging that by detection means the technical parameter of single fuse is controlled within the scope after direct current and the alternating voltage self-healing processing.

Among Fig. 1 capacitor core 1 to 3 assembled arrangement arranged side by side is got up, convert according to required capacity, the quantity that the mode of combination adopts can have various mode, lead-out

wire

4,5 is welded on the two ends of capacitance group.

The capacitance group that welding is finished is put into 7 li in box, at high temperature carry out cure process after again epoxy resin 6 being poured into.

Product is carried out the test of electric property, guarantee the quality of product.

Above-described specific embodiment only is the utility model preferred embodiment, and the equivalent arrangements of being done according to the utility model scope is technology of the present utility model and contains such as.

Claims

1, a kind of metallized film large value capacitor, the lead-in wire that comprises two ends, it is characterized in that described capacitor also comprises in the box, box by the metallized film capacitor fuse of some parallel connections forms capacitance group or some capacitance group again through coupled in series, box is interior to be solidified with epoxy encapsulation; The lead-in wire at two ends connects the two ends of capacitance group respectively.

2, metallized film large value capacitor according to claim 1 is characterized in that, described metallized film capacitor fuse is a basement membrane with polyester film or polypropylene film, and the thickness of basement membrane is at 1～4 μ m, and reeling after the evaporated metal layer on the basement membrane constitutes.

3, metallized film large value capacitor according to claim 2 is characterized in that, the metal level of evaporation is aluminum metal layer or zinc-aluminium metal level on the described basement membrane.

According to claim 2 or 3 described metallized film large value capacitors, it is characterized in that 4, the resistance of the metal level side of evaporation is 2 Ω～12 Ω on the described basement membrane.

5, metallized film large value capacitor according to claim 1 and 2 is characterized in that, the two electrode tip end faces spraying pltine and the Zinc-tin alloy metal level of described metallized film capacitor fuse.

6, according to claim 1 or 2 or 5 described metallized film large value capacitors, it is characterized in that the section of two electrode tips of described metallized film capacitor fuse is the flat shape.